The connection distance is up to 35 feet, so there is no need to worry about interruption in listening and control.You can automatically pair this device with the bluetooth-compatible device seamlessly without any problems when you open the headset box.Unique stereo sound quality and design provide you with perfect sound and CVC8.0 digital noise reduction technology, you can feel more realistic music.Equipped with a 250mah large-capacity battery, you can charge it anytime and anywhere, and only 1.5 hours of charging time, you can get 20 hours of listening to songs or 25 hours of talking.Choosing to wear different sizes of silicone earmuffs to make your ears comfortable, so that you will not feel uncomfortable wearing headphones for a long time, ideal for running, jogging, cycling, and exercising in the gym .It allows you to connect 2 bluetooth-compatible smart phones at the same time, so even if you have two mobile phones, you will never miss a call.Moreover, when answering the call, it will notify the phone number.Item Name: bluetooth-compatible HeadsetMaterial: PlasticModel: HMB-18Bluetooth-compatible Version: 5.0Bluetooth-compatible Distance: 33 ft / 10 mBuilt-in Microphone: YesMusic Playing Time: 18~20hTalk Time: 20~25hStandby Time: about 280hBuilt-in Battery: 250mAh(Included)Charging Time: 1.5hFeatures: Connect Two Devices, Equipped with Earplugs, Large-Capacity BatterySize: 4.8cm x 2cm x 1cm/1.89" x 0.79" x 0.39" (Approx.)Notes:Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Headset1 x Charging Cable2 Pairs of Earmuffs1 x User Manual